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18 July 2019 : Animal Research  

Inflammation Induces Lipid Deposition in Kidneys by Downregulating Renal PCSK9 in Mice with Adriamycin-Induced Nephropathy

Gaofu Zhang12BCDEFG, Qiu Li21A*

DOI: 10.12659/MSM.917312

Med Sci Monit 2019; 25:5327-5335

Abstract

BACKGROUND: Previous studies of human and animal models indicate that inflammation alters lipid metabolism. The pro-protein convertase subtilisin kexin type 9 (PCSK9) plays an important role in lipid metabolism.

MATERIAL AND METHODS: We examined the effect of inflammation on PCSK9 expression and lipid deposition in the kidneys of mice with Adriamycin-induced nephropathy.

RESULTS: The results indicated an increased expression of inflammatory cytokines and lipid deposition over 12 weeks. During this time, the expression of PCSK9 and its transcriptional activator (hepatocyte nuclear factor 1α, HNF1α) decreased, and the expression of the low-density lipoprotein receptor (LDLR) and its transcriptional activator (sterol regulatory element binding protein-2, SREBP-2) increased. Exogenous inflammation appeared to further aggravate this process.

CONCLUSIONS: Our mouse model of nephropathy suggests that a key step in the inflammation-induced deposition of lipids in the kidneys is the downregulation renal PCSK9 expression.

Keywords: Lipid Metabolism, nephrotic syndrome, Proprotein Convertases, Receptors, LDL, Down-Regulation, Doxorubicin, Hepatocyte Nuclear Factor 1-alpha, Kidney, Kidney Diseases, Lipids, Lipoproteins, LDL, Mice, Inbred BALB C, Nephritis, Proprotein Convertase 9, Sterol Regulatory Element Binding Protein 2

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750